Angular position selecting and controlling device for a rotary member

ABSTRACT

An angular position selecting and controlling device for a rotary member enabling to easily and arbitrarily pre-select a plural number of angular stopping positions of a rotary member by operating a button, and also enabling, by operation of another button, to stop the rotary member reliably with minimum power consumption successively at angular positions pre-selected as mentioned above, said angular position selecting and controlling device comprising a plurality of pins movably fitted along the circumference of the rotary member, two controlling levers for making those pins project from and push into the surface of the rotary member, an electromagnet having an armature which is capable of locking the rotary member at a stopped position, a stop lever engageable with the above-mentioned pins, a locking lever being engaged with said stop lever and being capable of holding the above-mentioned armature at a position where said armature is attracted by the electro-magnet, a switch for starting the rotary member by operation of the above-mentioned button and at the same time for energizing the electromagnet, and a switch for continuing the rotary motion of the rotary member being closed by the armature when said armature is attracted by the electro-magnet.

United States Patent,

Kimura et a1.

[ ANGULAR POSITION SELECTING AND CONTROLLING DEVICE FOR A ROTARY MEMBER[75] Inventors: Sachio Kimura; Yoshiaki Aoki;

Toshiki Kiriyama; Katsuro Shimomae, all of Tokyo, Japan [73] Assignee:Kabushiki Kaisha Koparu,

Tokyo-to, Japan 221 Filed: Jan. 5, 1973 21 Appl. No.: 321,465

[30] Foreign Application Priority Data Jan. 14, 1972 Japan 47-6497 Jan.19, 1972 Japan 47-8600 July 27, 1972 Japan 47-88493 [52] US. Cl.318/467, 318/673, 334/9 [51] Int. Cl. G051) 11/14 [58] Field of Search318/467, 673; 334/9 [56] References Cited UNITED STATES PATENTS2,812,486 11/1957 Foster 318/467 2,833,976 5/1968 Kennedy et a1 318/4672,965,829 12/1960 Lingenbrink et a1. 318/467 3,136,966 6/1964 Lindemanet a1 318/467 X 3,159,782 12/1964 Tyzack 318/467 X 3,256,473 6/1966Simopoulos et a1. 318/467 X [111 3,835,359 Sept. 10, 1974 PrimaryExaminer-T. E. Lynch Attorney, Agent, or Firm-Cushman, Darby & Cushman[5 7] ABSTRACT An angular position selecting and controlling device fora rotary member enabling to easily and arbitrarily pre-select a pluralnumber of angular stopping positions of a rotary member by operating abutton, and also enabling, by operation of another button, to stop therotary member reliably with minimum power consumption successively atangular positions preselected as mentioned above, said angular positionselecting and controlling device comprising a plurality of pins movablyfitted along the circumference of the rotary member, two controllinglevers for making those pihs project from and push into the surface ofthe retary member, an electromagnet having an armature which is capableof locking the rotary member at a stopped position, a stop leverengageable with the above-mentioned pins, a locking lever being engagedwith said stop lever and being capable of holding the above-mentionedarmature at a position where said armature is attracted by theelectro-magnet, a switch for starting the rotary member by operation ofthe above-mentioned button and at the same time for energizing theelectromagnet, and aswitch for continuing the rotary motion of therotary member being closed by the armature when said armature isattracted by the electro-magnet.

5 Claims, 9 Drawing Figures 11 IL/ 1 I 1111/ 41 PAIEMEBSEH 0 [914 ISHEET 2 OF 4 FIG. 4'

PATENIED SEP 1 mm SHEET 3 OF 4' FIG. 6 1

PATENTEB SEP 1 0 I974 SHEET t 0F 4 BACKGROUND OF THE INVENTION a. Fieldof the invention:

The present invention is concerned with a rotation controlling device ofa body of rotation and more particularly, to an angular positionselecting and controlling device for a rotary member which pre-select aplurality of angular positions of the rotary member and stop the rotarymember at said angular positions in turn.

b. Description of the prior art:

An angular position selecting and controlling device for a rotary membercan be applied to a wide range of machinery and apparatus. Especially,this kind of device can be suitably utilized as an automatic channelselecting and change-over device for a tuning circuit of an all-channeltuner for a television receiving set. For this kind of use, a patent isalready applied for as U.S. Pat. application Ser. No. 202,745 filed Nov.29, 1971, now U.S. Pat. No. 3,740,679. In the invention of theabove-mentioned application, the rotary member is stopped by using anelectro-magnetic device having an armature which can be engaged withsaid rotary member. Said electro-magnetic device is to be excited by asignal for starting the operation and de-energized by a signal forstopping. This kind of stopping device, how ever, has some drawbacks.First, as the electromagnetic device is to be kept excited duringrotary'operation of the rotary member, a self-holding circuit for thepower source is required for the electro-magnetic device. Secondly,power consumption is large as the electro-magnetic device is keptexcited during operation of the rotary member. Thirdly, the stop signalof the rotary operation is to be taken out from the stopping positionlimiting members arranged on said rotary member. But, there occurs adelay or time lag in operation of the eleetro-magnetic device from themoment when the signal is taken out to the moment when theelectromagnetic device is deenergized by the signal and the armatureengages with and stops the rotary member and moreover, said delay isunstable and it is difficult to keep the delay at a constant value.Consequently, it is difficult to stop said rotary member at the desiredpre-determined position.

SUMMARY OF THE INVENTION It is, therefore, a primary object of thepresent invention to provide an angular position selecting andcontrolling device for a rotary member for which said drawbacks areeliminated, i.e., when the electromagnetic device is excited by thesignal for starting rotary operation, said armature is mechanicallylocked at a position being disengaged from said rotary member so thatsaid armature cannot stop said rotary member even if theelectro-magnetic device is de-energized after that, besides, whenstopping rotary motion of said rotary member, an angular positioningmember arranged on said rotary member releases said locking mechanicallyand, at the same time as released, said rotary member is stopped by saidarmature.

It is another object of the present invention to provide an angularposition selecting and controlling device for which a plurality ofangular positions of the rotary member can be pre-selected easily andreliably by push-button control.

Other objects, features and advantages of the present invention will beapparent from the following description of the preferred embodiments ofthe invention illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an explanatory view of anembodiment of the angular position selecting and controlling deviceaccording to the present invention;

FIG. 2 shows a sectional view along the line Illl in FIG. 1;

FIG. 3 shows a sectional view along the line III-III in FIG. 1;

FIG. 4 shows a sectional view along the line IVIV in FIG. 1;

FIG. 5 shows an explanatory view of a channel selecting mechanism whichcan be utilized in combination with the controlling device shown in FIG.1 through FIG. 4;

FIG. 6 shows an electric connection diagram for the embodiment shown inFIG. 1 through FIG. 5;

FIG. 7 shows an explanatory view of another embodiment of the settingand resetting mechanism for the angular position limiting members of thecontrolling device according to the present invention;

the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventionis described in the following according to the embodiments where theinvention is applied to a tuning means of television receiving sets.

Referring to FIG. 1, numeral 1 designates a base plate which is suitablyfixed to the body of the television receiving set not shown here.Numeral 2 designates a motor mounted to the base plate and having arotary shaft to which a pinion 2a is integrally mounted. Numeral 3designates a gear which meshes with said pinion 2a and to which pinion3a is integrally mounted. Numeral 4 designates a gear meshing with saidpinion 3a. Numerals 5 and 6 designate gears which are mutually connectedin a manner like a friction clutch by the means not shown here and saidgear 5 meshes with said gear 4. Numeral 7 designates a channel displayblock having a mechanism similar to the leaftype digital indicationclocks of known art for which multiple leaves are mounted to a drumrotating corresponding to time and are turned over also corresponding totime, thus indicate time digitally by means of digits written onsurfaces of said leaves. Numeral 8 designates said leaves two of whichare shown here out of multiple leaves and other omitted here. Numeral 9designates a drum to which multiple leaves 8 are mounted. Numeral 10designates a gear mounted integrally with said drum 9 and meshing withsaid said gear 6. Numeral ll designates a leaf lock fixed to the baseplate 1. Numeral l2 designates a channel selecting drum fixed to a shaft13 which is rotatably supported by said base plate 1. To the drum 12, agear 14 meshing with said gear 6 is mounted integrally.

As shown in detail in FIG. 1, holes h (h,, h through h,,), respectivelycorresponding with each channelof the total channel number n, and a holeh for the reset position are provided along the circumference of theface of a channel selecting drum 12. Said holes are equally spaced bydividing the circumference by n 1. Along the periphery of said drum 12,notches C (C C,, C through C,,) for positioning and manual feed areformed in the number which corresponds to the number of said holes h (nl).-Besides, at the middle of said periphery of the drum 12, an annulargroove 120 with a depth reaching said holes h is formed as clearly shownin FIG. 2 and, moreover, a protuberance 12b is also formed on saidperiphery. Reference symbols P (P P P through P designate channelselecting pins respectively fitted in each of said holes h of said drum12. (In FIG. 1, single circles represent, for convenience sake, pinsprojecting toward the rear side as seen in the figure and double circlesrepresent pin projecting toward the front side.) As shown in FIG. 2, twoannular grooves g andg are formed on the periphery of every pin. Numeraldesignates a belt elastically fittedin the annular groove 12a of saiddrum l2.

Numeral l6 designates an electro-magnet (see FIG. 6) for stopping whichis arranged at the position where a holding pin 16b attached to anarmature 16a can engage in the notches C of said drum 12. Said armature16a has a stepped portion 160 as shown in FIG. 3 and is biased by thespring 17 in the direction away from the iron core. Numerall8'designates a stop lever having two arms 18a and 18b which ispivotably mounted to a shaft fixed to the base plate 1. Said arm 18a canbe engaged with said selecting pins P when they are projecting towardthe forward side in FIG. 1. Numeral 19 designates a'locking lever havingtwo arms 19a and 19b which is mounted to a shaft fixed to the base plate1 and is biased counterclockwise by a spring 20. Said arm 19a is engagedwith the arm 18b of said lever 18 while the tip of said arm 19b can beengaged with the armature 16a of said electro-magnet 16. Referencesymbol SW designates a normally-open type switch (see FIG. 6) whichcloses, when the armature 16a of said electromagnet 16 is attracted, byengaging with said armature 16a. Reference symbol SW designates .aselector switch which is changed over by the arm 18b of said lever 18.Reference symbol SW designates a normallyopen type switch which closesby engaging with the protuberance of said drum l2. Numeral 21 designatesa channel controlling lever slidably mounted to the base plate landbeing biased leftward in FIG. 1 by the spring 22. Numeral 21a designatesa button fixed to one end of said lever 21. Reference symbol SWdesignates a normally-open type switch which closes by engaging withanother end of said lever 21 when the lever 21 moves rightward in FIG.1.

In FIGS. 1 and 4, numeral 23 designates a. first controlling lever forfeeding said drum 12 manually and for setting said channel selectingpins P. Numeral 24 designates a second controlling lever for resettingsaid pins P. Both levers 23 and 24 are supported by the base plate 1 anda post 25 mounted to said base plate and can be removed rightward andleftward in the figures. Numerals 23a and 24a represent buttonsrespectively fixed to levers 23 and 24. Said lever 24 has a steppedportion 24b and a slot 24c which engages with said post 25. Besides,pins 24a and 24e are fixed to said lever 24. Numeral 26 designates aspring fixed to the base plate l on one end and to said pin 24e on theother end. Said lever 23 has a stepped portion 23b similar to thestepped portion 24b of said lever 24. Numeral 27 designates a feed leverhaving slots 27a and 27b, a stepped portion 270 and a pin 27d fixed tosaid feed lever 27.

To said slots 27a and 27b, pins 24d and 24e of said lever 24, are fittedthus, said lever 27 is movably mounted to said lever 24. Numeral 28designates a spring stretched between said lever 24 and lever 27.Numeral 29 designates a feed pawl pivotably mounted to the pin 27d ofsaid lever 27 and biased counterclockwise by the spring 30. The free endof said pawl 29 engages with the notches C of said drum l2. Numerals 31and 32 respectively designate the setting lever'and resetting lever forsetting or resetting said channel selecting pins P which are pivotablymounted to shafts 33 and 34 fixed to the base plate 1 and are biasedcounterclockwise or clockwise bysprings 35 or 36 stretched between saidlever 31 or 32 and base plate 1.

Numerals 37 and 38 designate pin hammers which are respectivelyextending from said levers 31 and 32 and can be engaged with each endportion of the channel selecting pins P on said drum l2. Said lever 31comes to its static position when the protuberance 31a is engaged withthe stepped portion 23b of said first controlling lever 23 and a portion(not shown) of said lever 23 contacts the base plate 1. Said lever 32comes its static position when similarly provided protuberance 32acontacts said shaft 33. Besides, said protuberance 32a can be engagedwith the stepped portion 24b of said second controlling lever 24.

FIG. 5 shows a tuning circuit change-over mechanism block which ismechanically independent of the channel selecting mechanism block shownin FIG. 1. Numeral 39 designates a base plate mounted to the televisionreceiving set body which is not shown here. Numeral 40designates a groupof contacts of a switch mechanism fixed to said base plate 39. Thecommon contact T and individual contacts T,, T through T,, are connectedto a (variable) resistance circuit group for imposing the tuningvoltage, which corresponds to each channel, for example to the variablecapacity elements in the tuning circuit not shown here. Numeral 41designates a rotary shaft for changing over said switch mechanism 40whichis supported by a method not illustrated. Said shaft 41 carriesratchet teeth R with the number corresponding to said contacts and alsocarries a sliding contact piece not illustrated, which connects saidcommon contact T to individual contacts. Said shaft 41 is furtherprovided with a spring not illustrated which biases said shaft 41clockwise in FIG. 5 and is arranged so that it is stopped at apredetermined reset position by a stopper not shown when said shaft 41is free. Numeral 42 designates an electro-magnet for feed (see FIG. 6)fixed to said base plate 39. The armature 42a of said electro-magnet 42is biased by a spring 43 in the direction away from the iron core and apin 42b is fixed to the tip of said armature 42a. Numeral'44 designatesa feed pawl which is rotatably mounted on said pin 42b. Said feed pawlis biased clockwise around said pin 42b by a spring not illustrated andis held, when it is free, at a pre-determined position (shown by adotted line) by means of a stopper not shown here. Said pawl 44 can beengaged with said ratchet tooth R. When said electro-magnet 42 isde-energized after being excited, said pawl 44 engages with one of saidratchet teeth R by action of the spring 43 and changes the connection 5by one pitch of said teeth R, that is, to the adjacent contact in thecontact group T. Numeral 45 designates a fixed guide of said pawl 44.Numeral 46 designates an electro-magnet for resetting, an armature 46aof which is rotatably mounted to a shaft 47 fixed to said base plate 39and is biased counterclockwise by a spring 48. The free end of saidarmature 46a forms a stopping pawl 46b which is'engaged with a ratchettooth R on said shaft 41 when said electromagnet 46 is not energized.

FIG. 6 shows electric connection which relates the channel selectingmechanism block shown in FIG. 1 and tuning circuit change-over mechanismblock shown in FIG. 5. Reference symbols SW, through SW,, respectivelydesignate switches in the above-mentioned mechanisms. Numerals 16, 42and 46' respectively represent coils of electro-magnets 16, 42 and 46.Reference symbols D, through D designate diodes and reference symbol Rrepresents a resistor. Reference symbol SW represents a remote controlswitch which can be connected in parallel to the switch SW, as required.Reference symbols a and b designate change-over contact terminals ofsaid switch SW and reference symbol represents the output terminal ofthe operation signal of the AFC circuit.

The operation of the embodiment of the present in-' vention arranged asabove is as described below.

The embodiment shown in FIG. 1 is in the condition that the channel rt-2is selected and the following description refers to the case where thechannel l is to be selected from the above condition. In the conditionshown in FIG. 1, every switch is at the position shown in FIG. 6 and themotor 2 and electro-magnets 16, 42 and 46 are all in de-energizedcondition. When the button 21a of the channel controlling lever 21 ispushed in this condition, the switch SW, is closed, the circuit from themotor 2 to the switch SW, through the diode D, is formed as it isevident from FIG. 6 thus the motor 2 is started. At the same time, thecircuit from the electro-magnet 16 to the switch SW, is alsoformed, andtherefore, the electro-magnet 16 is energized, and its armature 16a isattracted and moves to the position shown by a dotted line.Consequently, the channel selecting drum 12 is disengaged from theholding pin 16b and begins to rotate as driving power from the motor 2is transmitted to the gear 14 through gears 3, 4, and 6. At that time,the feed pawl 29 is engaged with and then disengaged from notches C onthe periphery of said drum 12. As said drum 12 rotates, the stop lever18, which is turned counterclockwise (to the position shown by a fullline) because its arm 18a is engaged with the pin P,, projecting to thefront side as seen in FIG. 1, turns clockwise as it is disengaged fromsaid pin P,,.,, and moves to the position shown by a dotted line. Thismotion is caused by the force of the spring 20 applied to the lockinglever 19 which is engaged with said lever 18. As said lever 18 moves,said lever 19 also moves to the position shown by a dotted line.Therefore, on this stage, the armature 16a is mechanically held in theattracted condition (position shown by dotted lines), as illustrated,even if the pushed button 21a is released, the switch SW, is opened andthe current to the electro-magnet 16 is disconnected due to the factthat the arm 19b of said lever 19 has been put into the stepped portion160 of said armature 1612 (See FIG. 3).

On the other hand, the switch SW is closed when said armature 16a is atthe attracted position, the circuit from the motor 2 to the switch SW isformed instead of the above-mentioned motor driving circuit even whenthe switch SW, is opened, thus the motor 2 and consequently the drum 12keep on rotating. As the pin P,, at the position of the adjacent nextchannel n-l" is not in the set position, the lever 18 is kept at theposition illustrated by a dotted line and said drum keeps on rotatingwithout stopping at the selecting position of said channel n-l As thepin P,, at the position of the next channel n is in the set position,the arm 18a of the lever 18 is pushed up by said pin P,, as the drum 12rotates and said lever 18 is turned counterclockwise. The armature 16a,which was mechanically held, turns clockwise to the position shown by afull line because the lever 19 thurns clockwise according tocounterclockwise turn of the lever 18 and its arm 19b releases thearmature 16a. So, the holding pin 16!; engages with the notch of thedrum 12 and stops the drum 12. Thus, the channel n is selected. As gears5 and 6 are coupled like a friction clutch, inertia of the motor 2 forwhich the power source is disconnected by opening of the switch SW isabsorbed by said friction clutch at that time and the drum 12 can beeasily stopped instantaneously from the rotating condition.

On the other hand, by the above-mentioned opera- 3 tion, rotation of thegear 6 is also transmitted to the gear 10. Thus, the leaf 8 is turnedover corresponding tothe channel selecting position of said drum 12 andthe channel number n is indicated in this case. When the button 21a ispushed again, in the above condition, to close the switch SW,, anoperation same as mentioned above is carried out and the drum 12 stopsat the position where the lever 18 is turned counterclockwise by the pinP, which is set at the next position relative to rotation of the drum12. Thus, the channel l is selected and the channel number l isindicated by the leaf 8.

Besides, when the present channel is selected, the switch SW is changedfrom the terminal a to the terminal b because of counterclockwise motionof the lever 18 and an operating voltage for the AFC circuit is imposedto the terminal 0 (FIG. 6).

Actual change-over of the tuning circuit involved in channel selectionby the above-mentioned channel selecting mechanism is carried out by themechanism shown in FIG. 5.

The mechanism shown in FIG. 5 is arranged to compose the tuning circuitscorresponding to the preset channel number (20, for example), which isthe maximum number of channels usually receivable in one area, out ofthe overall channel number (62, for example) contained in theabove-mentioned channel selecting mechanism. To every contact in thismechanism, a resistance is connected beforehand for imposing the tuningvoltage to the variable capacity element, which is connected to thetuning circuit in order to tune to each telecast channel in thereceiving area.

Assuming that a sliding contact piece not illustrated is connected tothe contact T,,,- which composes the tuning circuit for the channel n2in the illustrated condition and the switch SW, is closed by pressingthe button 21a in order to select the channel l from the channel n-2" asdescribed in the above, the following circuit is formed at the same timein addition to the abovementioned operation, i.e., the circuit from theswitch SW, coil42' of the electro-magnet 42 diode D diode D, totheswitch SW, (or switch SW So, the electro-magnet 42 is energized, thearmature 42a is attracted and the feed pawl 44 is disengaged from theratchet tooth R of the rotary shaft 41 (to the position shown by adotted line). At that time, the shaft 41 tends to turn clockwise by thespring notshown. As, however, the shaft 41 is held by the resetting pawl46b of the armature 46a, the tuning circuit of the channel rt-2 is stillcomposed. After that, when the drum 12 passes through the position ofthe pin P,, which is not preset and stops at theposition of the nextpreset channel selecting pin-P the switch SW isopened at the same time,the above-mentioned operation circuit of the electro-magnet 42 is openedand said electromagnet 42 releases the armature 42a. Therefore, the feedpawl 44 mounted to the armature 42a engages with the ratchettooth R onthe shaft 41 and turns the shaft 41 counterclockwise by onetoothresisting the clockwise bias of the shaft 41. Thus, the tuning circuitis changed over and telecast of the channel n is received.

When the button 21a is pushed again after the shove, the same operationas described in the above is carried out and the drum 12 stops at theposition of the next preset channel selecting pin P,, the tuning circuitis also changed over and the telecast of the channel 1 is received.

On the way during change-over from the channel *n to the channel l (atthe position of the hole h,,), the protuberance 12b provided at aportion on the periphery of the drum 12 engages with the switch SW(position shown by a dotted line in FIG. 1) and closes said switch SW,,.Consequently, the electromagnet 46 works and releases the pawl 46b ofthe armature 46a, which was holding the shaft 41 from clockwiserotation, from the ratchet tooth R, thus said shaft 41 is quickly resetto the aforementioned reset position. Therefore, the tuning circuit ischanged over in turn as described above being corresponding to pins P,which are preset successively, until the drum finishes its one rotation.a The setting and resetting mechanism for the abovementioned channelselecting pins P on the drum 12 is shown in FIGS. 1,2 and 4.

First, to reset said pins P, the button 24a of the second controllinglever 24 is to'be pushed. That is, when said button 24a is pushed, thefeed lever 27 is moved integrally by action of the spring 28 stretchedwith suitable tension and the drum 12 is turned by a predetermined angleby the feed pawl 29 mounted to said lever 27. At that time, the positionof said drum 12 is limited by the holding pin 16b provided to thearmature 16a of the electro-magnet 16. At the time when said drum 12 isturned by a predetermined angle, the stepped portion 27c of said feedlever 27 contacts the post 25 and said lever 27 is held at thatposition. When the button 24a is further pushed by resisting the spring28, only the second controlling lever 24 moves further and, by thismovement, the stepped portion 24b of said lever 24 contacts theprotuberance 32a of the resetting lever 32 to turn said lever 32counterclockwise resisting the spring 36 (FIG. 4). Thus, the pin hammer38 provided at the end of the lever 32 moves the pin P to the resetposition (as shown by a two-dot chain line in FIG. 4).

On the other hand, said pin P at the reset positionis moved to thesetposition by pushing the button 23a of the first controlling lever 23That is, when said button 23a is pushed, the stepped portion 23b of saidlever 23 contacts the protuberance 31a of the setting lever 31, whichturns clockwise resisting the spring 35 (FIG. 4). Therefore, the pinhammer 37 of said lever 31 moves the pin P from the reset position tothe set position in the same way as described above.

The channel selecting pin P is held at the set or reset position asfollows. That is, as it is evident from FIG. 2, the elastic belt 15fitted in the annular groove- 12a of the drum 12 fits in one of annulargrooves g, and g provided on the'periphery of said pin P, i.e., saidelastic belt 15 fits in said groove g, when said pin P is at the setposition and insaid groove g when said pin P is at the reset position.

Besides, when rotation of the drum 12 is stopped as described in theabove at the position where the channel selecting pin P is set, the stoplever 18 comes to the position shown by a full line in FIG. 1. At thattime, the switch SW connected as shown in FIG. 6 is changed a over atthe same time as the abovementioned operation and the connection of themovable contact of said switch SW is changed over from the terminal a toterminal b. By this, a voltage is imposed to the terminal 0 to activatethe AFC circuit which was inactive during rotation of the drum 12. Inthe arrangement as described in the above, it is not always necessary toprovide the hole h at the working position of the drum vl2 where thetuning circuit change-over mechanism is reset and the pin P fitted insaid hole h Besides, it is also possible to integrally compose the stoplever 18 and locking lever 19.

Instead of the afore-mentioned remote control switch SW by wiredconnection, it is also possible to directly operated the switch SW, byradio control.

For the afore-mentioned switch mechanism 40 and switches SW, through SWit is also possible to adopt the non-contacting arrangement by usingmagnets and lead relays in combination.

The armature 16a of the electro-magnet 16 shown in FIG. 1 can be alsoheld at the attracted position by electrically arranging aself-holding'circuit of said electro-magnet l6.

The feed pawl 29 is not always required to be normally engaged with thenotches C of the drum 12.

FIGS. 7 through 9 show another embodiment of the setting and resettingmechanism for the channel selecting pins P on the drum 12 involved inthe abovementioned embodiment of the present invention. In thisembodiment, the switch SW, is arranged as a selector switch (FIG. 9),the lever 23 is provided with a resilient controlling member 230 foroperating said switch SW,, thus the lever 27 and feed pawl 29 providedto the above-mentioned first embodiment are eliminated.

Operation of the mechanism shown in FIGS. 7 through 9 is as describedbelow.

Assuming that FIG. 7 shows the condition when the channel n-l isselected, the channel I will be selected from this condition asdescribed below. In FIG. 1, every switch is at the position shown by afull line in FIG. 9 and the motor 2 and electro-magnet 16 are both indc-energized condition. When the button 21a of the channel controllinglever 21 is first pushed in the above condition, connection of theswitch SW, is changed over (to the position shown by a dotted line inFIG. 9), the electro-magnet 16 is excited and its armature 16a isattracted and moves to the position shown by a dotted line in FIG. 7.Therefore, the channel selecting drum 12 is disengaged from the holdingpin 16b and, at the same time, the switch SW is closed. At that time,however, the locking lever 19 is not engaged with the stop lever 18 and,therefore, said locking lever 19 is disengaged fromthe stepped portion160 of the armature 16a because of the movement of said armature 16a tothe position shown by a dotted line, turns counterclockwise to theposition shown by the one-dot chain line in FIG. 7 and stops at thatposition. Thus, the armature 16a is held in the attracted condition bythe locking lever 19 even when the button 21a is released and the switchSW is held in the closed condition.

By resetting of the selector switch SW, caused by releasing of thebutton 21a in this condition, the switch SW is changed over'again andconnected as shown by a full line in FIG. 9. So, the circuit of themotor 2 is closed and the motor 2 begins to rotate. Consequently, thechannel selecting drum 12 turns being driven through the illustratedreduction gear mechanism. At that time, a ratchet stopper not shown hereis suitably engaged with the notches C of said drum 12.

As said drum 12 rotates, the arm 18a of the lever 18 tends to engagewith the pin P at the next position immediately. But, as said pin P isreset, the lever 18 does not work at that position at all. By thesubsequent rotation of the drum 12, the stop lever 18 engages with thepin P, at the next position as said pin P, is in the set condition andsaid lever 18 is turned counterclockwise to the position shown by thedotted line. By this motion, the locking lever 19 is turned clockwise asits arm 19a is engaged with the arm 18b of the lever 18, thus thearmature 16a locked by the end portion of the arm 19b is released.Consequently, the armature 16a tends to return to the positionillustrated by the full line. At that time, the switch SW, is releasedand the holding pin 16b becomes engageable with the notches Cof the drum12. The drum 12 turns by inertia to some extent even when the circuit ofthe motor 2 is opened and then stops as the holding pin 16b completelyengages with the notches C. At that time, the stop lever 18 drops to theposition shown by the full line as its arm 18a is already disengagedfrom the pin P,. Consequently, the locking lever 19 also becomes freeand is turned counterclockwise by the spring 20. But, thecounterclockwise turning is stopped halfway by the stepped portion 160of the armature 16a and the lever is held at the position illustrated bythe full line.

For the above-mentioned channel selecting mechanism, the program settingoperation by pins P on the drum 12 for making said mechanism memorizethe selecting positions is performed as follows.

When the button 23a of the first controlling lever 23 is pushed first,the switch operating member 23c changes the switch SW, over. Therefore,an operation same as in the above-mentioned case, where the button 21aof the channel controlling lever 21 is pushed, is carried out and themotor 2, in other word the drum 12, becomes ready to rotate. In thiscase, however, the actuating end 23b of the lever 23 works on theprojecting end 31a of the setting lever 31 at the same time and turnssaid lever clockwise (FIG. 8) resisting the force of the spring 35.Consequently, the pin hammer 37 moves the pin P to the set positionwithout fail. In this case, the pin P to be operated is the pin at theposition just next to the position which corresponds to the channelselected (indicated) at that time. For example, if

the channel nl is selected at present, the pin P,, at the positioncorresponding to the next channel n is set by the above operation. Whenthe button 23a is then released the switch SW, is again changed over toits original position and, at the same time, the lever 31 also returnsto its original position. Therefore, an operation same as theafore-mentioned case, where the lever 21 is released, is performed andthe drum 12 rotates. In this case, however, the pin P at the nextadjacent position is always set and the drum l2 always stops at saidnext adjacent position.

Therefore, judging whether the newly stopped position corresponds to thechannel to be received, the button 24a of the second controlling lever24 may be pressed again when it is not the necessary channel. Thus, theactuating end 24b of the lever 24 works on the engaging portion 32a ofthe presetting lever 32 to turn said lever 32 counterclockwise byresisting the force of the spring 36 and the pin hammer 38 resets theset pin P.

By repeating the above-mentioned operation, memory pins P of necessarychannels are set. After that, the drum 12 is automatically stoppedaccording to the set program of pins P only by pressing the channelcontrolling button 2la and the necessary channels are selected in turn.

The reason why the switch SW, is arranged as a selector switch in thisembodiment is as described below. That is, in the former embodimentshown in FIGS. 1 through 6, the electro-magnet 16 is excited and themotor 2 is rotated at the same time when'the switch SW, is closed.Therefore, the drum 12 continuously rotates as lone as said switch SW,is kept closed and does not stop even when the pin P moves levers 18 and19. This fact is advantageous when it is required to select the desiredchannel quickly. On the other hand, however, this arrangement has'adisadvantage that, when it is desired to select the channel n after thechannel nl, the drum 12 may pass the stopping position of the desiredchannel n unless the once closed switch SW, is opened immediately. Tosolve this problem, the switch SW, is composed as a selector switch inthis embodiment and it is arranged so that the drum 12 stops withoutfail at the position of the preset channel selecting position. Of coursethe circuit shown in FIG. 9 can be also used for the mechanism shown inFIG. 1 only by changing the switch SW, for a selector switch.

We claim:

1. An angular position selecting and controlling device for a rotarymember comprising:

a driving device,

a rotary member which rotates being interlocked with said driving deviceand can be stopped at every pre-determined rotary angle,

a stopping position limiting member which is movably attached to saidrotary member in order to stop said rotary member at the position of thepredetermined rotary angle,

an electro-magnetic device having a pole-contacting member which isarranged adjacent to said rotary member and disengageably engages withsaid rotary member,

a first switch for opening and closing the energizing circuits of saiddriving device and said electromagnetic device,

a second switch which is engageable with said polecontacting member andwhich closes the operating 1'1 circuit of said driving device by meansof said polecontacting member when said pole-contacting member isattracted by said electro-magnetic 'device, 5 v

a stop lever member which is arranged adjacent to said stopping positionlimiting member and is engageable with said stopping position limitingmember, and a locking lever member which is engaged with said stop levermemberand is engageable with said pole-contacting member,

said angular position selecting and controlling device being arranged soas to retract said pole-contacting member from said rotary member byclosing said first switch and ,to mechanically lock said polecontactingmember at the position "where said polecontacting member is attracted bysaid electromagnetic, device and, at the same time, to rotate saidrotary member by closing said second switch by said pole-contactingmember, and said angular position selecting and controlling device beingfurther arranged so as to subsequently re lease the mechanical lockingof the abovementioned pole-contacting member by means of engagement ofthe stopping position limiting member'preset on said rotary member andsaid stop lever member and, at the same time, to open said second switchthereby making the pole-contacting member work on the rotary member andto thereat stop said rotary member.

'2. An angular position selecting and controlling device for a rotarymember according to claim 1, in which said device is provided with aselector switch as said first switch; said first switch being arrangedso as to close said second switch by closing the operating circuit ofsaid electro-magnetic device when said first switch is changed over tothe first selecting position and, subsequently to close the operatingcircuit of said driving device when said first switch is changed over tothe second selecting position.

3. An angular position selecting and controlling device for a rotarymember according to claim 1, in which the device further comprises agroup of change-over contacts each being arranged relative to saidrotary member and being operable to compose circuits of a number smallerthan the number'of total angular positions in which said rotary membercan be stopped, a contact change-over member supporting said group ofcontacts and being provided with ratchet teeth with a number of teethcorresponding to the number of contacts in said group of contacts, afirst electromag netic device having a pole-contacting member which isarranged adjacent to said contact change-over member and being energizedduring the time when said rotary member is rotating, a feed pawlpivotably mounted to said pole-contacting member and capable of feedingsaid contact change-over member by one pitch by engaging'with saidratchet tooth when said first electromagnetic device is de-energized, asecond electromagnetic device having a 'pole-contacting. member 'whichis arranged adjacent to said contact change-over member and engages withsaid ratchet tooth when said second electro-magnetic device is inde-energized condition, and a switch arranged adjacentto said rotarymember and being closed to actuate said second electro-magnetic devicewhen said rotary member completes its one rotation.

4. An angular position selecting and controlling device for a rotarymember according to claim 1, in which the device further comprises afirst operating member arranged at a position where said first operatingmember is engageable with said stopping position limiting member and,when being operated, moving said stopping position limiting member,which is at the reset position when said first operating member is to beoperated, to the set position by engaging with said stopping positionlimiting member; a second operating member arranged at a position wheresaid second operating member is engageable with said stopping positionlimiting member and, when being operated, said second operating memberin the latter stage of its operating stroke moving said stop positionlimiting member, which is at the set position, to the reset position byengaging with said stopping position limiting member; and a thirdoperating member connected to said second operating member and movingintegrally with said second operating member in the first stage of theoperating stroke of said second operating member in order to turn saidrotary member by one pitch.

5. An angularposition selecting and controlling device for a rotarymember according to claim 1, in which the device further comprises afirst operating member arranged at a position where said first operatingmember is engageable with said stopping position limiting member and,when being operated, setting said stopping position limiting member,which corresponds to the position next to the position selected at thattime, by operating said first switch and energizing said electro-magnet,and at the same time, by opening the aforementioned driving circuit, andwhen said first operating member is returned to its original position,said first operating member being capable of closing said second switch;and a second operating member arranged at a position where said secondoperating member is engageable with said stopping position limitingmember and, when being operated, said second operating member beingcapable of resetting said stopping position limiting member whichcorresponds to the abovementioned position selected at that time.

1. An angular position selecting and controlling device for a rotarymember comprising: a driving device, a rotary member which rotates beinginterlocked with said driving device and can be stopped at everypre-determined rotary angle, a stopping position limiting member whichis movably attached to said rotary member in order to stop said rotarymember at the position of the pre-determined rotary angle, anelectro-magnetic device having a pole-contacting member which isarranged adjacent to said rotary member and disengageably engages withsaid rotary member, a first switch for opening and closing theenergizing circuits of said driving device and said electro-magneticdevice, a second switch which is engageable with said pole-contactingmember and which closes the operating circuit of said driving device bymeans of said pole-contacting member when said polecontacting member isattracted by said electro-magnetic device, a stop lever member which isarranged adjacent to said stopping position limiting member and isengageable with said stopping position limiting member, and a lockinglever member which is engaged with said stop lever member and isengageable with said pole-contacting member, said angular positionselecting and controlling device being arranged so as to retract saidpole-contacting member from said rotary member by closing said firstswitch and to mechanically lock said pole-contacting member at theposition where said pole-contacting member is attracted by saidelectro-magnetic device and, at the same time, to rotate said rotarymember by closing said second switch by said pole-contacting member, andsaid angular position selecting and controlling device being furtherarranged so as to subsequently release the mechanical locking of theabove-mentioned pole-contacting member by means of engagement of thestopping position limiting member preset on said rotary member and saidstop lever member and, at the same time, to open said second switchthereby making the polecontacting member work on the rotary member andto thereat stop said rotary member.
 2. An angular position selecting andcontrolling device for a rotary member according to claim 1, in whichsaid device is provided with a selector switch as said first switch;said first switch being arranged so as to close said second switch byclosing the operating circuit of said electro-magnetic device when saidfIrst switch is changed over to the first selecting position and,subsequently to close the operating circuit of said driving device whensaid first switch is changed over to the second selecting position. 3.An angular position selecting and controlling device for a rotary memberaccording to claim 1, in which the device further comprises a group ofchange-over contacts each being arranged relative to said rotary memberand being operable to compose circuits of a number smaller than thenumber of total angular positions in which said rotary member can bestopped, a contact change-over member supporting said group of contactsand being provided with ratchet teeth with a number of teethcorresponding to the number of contacts in said group of contacts, afirst electromagnetic device having a pole-contacting member which isarranged adjacent to said contact change-over member and being energizedduring the time when said rotary member is rotating, a feed pawlpivotably mounted to said pole-contacting member and capable of feedingsaid contact change-over member by one pitch by engaging with saidratchet tooth when said first electro-magnetic device is de-energized, asecond electro-magnetic device having a pole-contacting member which isarranged adjacent to said contact change-over member and engages withsaid ratchet tooth when said second electro-magnetic device is inde-energized condition, and a switch arranged adjacent to said rotarymember and being closed to actuate said second electro-magnetic devicewhen said rotary member completes its one rotation.
 4. An angularposition selecting and controlling device for a rotary member accordingto claim 1, in which the device further comprises a first operatingmember arranged at a position where said first operating member isengageable with said stopping position limiting member and, when beingoperated, moving said stopping position limiting member, which is at thereset position when said first operating member is to be operated, tothe set position by engaging with said stopping position limitingmember; a second operating member arranged at a position where saidsecond operating member is engageable with said stopping positionlimiting member and, when being operated, said second operating memberin the latter stage of its operating stroke moving said stop positionlimiting member, which is at the set position, to the reset position byengaging with said stopping position limiting member; and a thirdoperating member connected to said second operating member and movingintegrally with said second operating member in the first stage of theoperating stroke of said second operating member in order to turn saidrotary member by one pitch.
 5. An angular position selecting andcontrolling device for a rotary member according to claim 1, in whichthe device further comprises a first operating member arranged at aposition where said first operating member is engageable with saidstopping position limiting member and, when being operated, setting saidstopping position limiting member, which corresponds to the positionnext to the position selected at that time, by operating said firstswitch and energizing said electro-magnet, and at the same time, byopening the afore-mentioned driving circuit, and when said firstoperating member is returned to its original position, said firstoperating member being capable of closing said second switch; and asecond operating member arranged at a position where said secondoperating member is engageable with said stopping position limitingmember and, when being operated, said second operating member beingcapable of resetting said stopping position limiting member whichcorresponds to the above-mentioned position selected at that time.